package com.sky.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        // 1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        // 2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            // 账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            // 密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            // 账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        // 3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employee
     * @return
     */
    @AutoFill(OperationType.INSERT)
    public void save(Employee employee) {
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
        // 动态获取创建人和修改人的id
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询员工
     *
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        // 创建分页对象
        Page<Employee> employeePage = new Page<>(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        // 创建查询条件对象
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<Employee>()
                // 如果姓名有值则模糊查询
                .like(employeePageQueryDTO.getName() != null && !employeePageQueryDTO.getName().isEmpty(),
                        Employee::getName, employeePageQueryDTO.getName())
                // 倒序显示
                .orderByDesc(Employee::getId);
        // 赋值查询结果
        employeePage = employeeMapper.selectPage(employeePage, queryWrapper);
        long total = employeePage.getTotal();// 获取总条数
        List<Employee> records = employeePage.getRecords();// 获取结果信息集合
        return new PageResult(total, records);
    }

    /**
     * 改变员工访问状态
     *
     * @param employee
     * @return
     */
    @AutoFill(OperationType.UPDATE)
    public void changeStatus(Employee employee) {
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    public Employee selectById(Long id) {
        return employeeMapper.selectById(id);
    }

    /**
     * 编辑员工信息
     */
    @AutoFill(OperationType.UPDATE)
    public void updateEmployee(Employee employee) {
        employeeMapper.update(employee);
    }

}
